Pump.



F. A. FAY.

PUMP.

APPLICATRON FILED MAY I. I917.

v INVENTCR. finial J9 1Z2 1 .A TTORNE Y sudden shock whereby the UNITEDSTATES PATENT curios.

FRANK A; FAY, 0F CALDWELL, NEW J ERS EY, ASSIGNQR TO WILIAIAM E. QUIMBY,INCL,

OF NEW YORK, N. Y. A CORPORATION OF NEW YORK.

- r'nmr.

Specification of. Letters Patent.

Patented Apr. 1, 1919.

Application filed May 1', 1917.' Serial No. 165,688.

To all'wlwgn it may concern: I

Be it known that I, F new; A. FAY, a citizen of the United-States,residing at Caldwell, in the county of Essex j and State of New Jersey,have invented new and useful- Improvements in Pumps, of which thefollowing is a specification.

My invention relates to pumps, particu-' larly those adapted for deepWells, and consists in a new construction and arrangement of partswhereby the crystallizing. and breaking of the gears due to irregularshocks areovercome. n these pumps as now commonly made, when the crankgoes by the cen; ter on the up stroke, the weight of the column ofwater, rods, valves, etc., drops with a teeth are wo 'n, (or broken)which causes hammering and back laslr;- resulting in crystallization andfinal breaking of the teeth. This defect and danger has long beenrecognized and atin the several .nected t tempts have been made toovercome it, for

the rods out of wood or e weight and reduce the instance by nlilakinpipin tolig ten 1-. shock. A

Such attempts are merely palliatives but I have overcome the trouble byintroducing at some suitable point a cushion, or frictional resistance,to prevent sudden drop of the rod, etc, and to prevent shock on thegears,

My invention is illustrated in the drawing herewith in which theinvention is shown embodied in a suitable concrete form and wherein thereference characters of this description are applied to correspondingparts views. 3 In the drawing Figure 1 is a vertical sectional view of apump embodying the features of my invention; Fig. 2 is a view in sideelevation at right-angles thereto; and Fig. 3 is a detail verticalsectional view of the fluid check device thereof.

In the construction shown the operating parts-of the pump are supportedin a suitable standard 1 and consist of the driving pulley 2 journaledon a shaft '3 having drive pinion 4 thereon in mesh with the crank-geareccentric pin 6 to which is cone" connecting rod 7 connected at itsupper end to stud 8 of a vertically recipro- 5 having 0 crating on asuitable way 10 Also connected to the stud 8 isthe vertically operatingpiston rod 12 of the pump which carries the uSurl piston, not shown,opcratingwithin the cylindrical wall invention her which is droppedbelow the sur pipe 13 suspended from-the supporting cap on member 18-whose flangedupper end rests upon the base portion of the standard. Inso far as described the-arrangement is: of the usual construction. a

, In accordance with my invention a fluid compression device is arrangedto be' associated with the reciprocating parts as described in a mannerwhereby it will act thereon to cushion or check the descent. of theparts upon the crank-pin passing center after-completing the up strokeand is so 10- rated, below the standard, as to avoid freezing. In theapproved arrangement of my e shown the' cushion device comprises a checkpiston element 14 ailixed to the 'pumprod 12 and operating Within acylindrical chamber 15 formed in the cylindrical member 16 which, withinthe well pipe, is threaded at its upper end to the supporting member 18and is closed at itslower end by the cap element17 threaded thereto, thecap member being-provided with a central bearing through which thepiston rod passes.

A valve disk 21' is arranged as ;shown yieklingly suppported against thepiston by means of a light coil s ring 22 bearing upon a shoulder 23 ofthe piston rod. The piston is .provided with openings 24 and the valvedisk is formed with small perforations 25 as indicated to restrict thepassage of fluid therethrough. The frame 15 is filled with a suitablefluid, for instance water from the rising column of water in the wellpipe which will enter the chamber through openings 33 provided ther forin the casing 16.

In operation the valve disk 21 will yield against the influence of thespring 22 on the upstroke of the pistonrod but on the, return downstroke will be forced against the piston 15 by the pressure of the fluidand will frictionally retard the down stroke proportionate to theresistance resulting from the restricted area of the small openings 25therein. Tl 1e arrangement thus provided will operate to supporttheparts during -the downward return. stroke of the piston and therebyrelieve the parts from shock, while the chamber itself, which is locatedwithin the well pipe, is surrounded by the coluum usual dischargeopening 3 As here shown the cushioning chamber,

ceonly a be normally warmed by the pumped liquid,

. or otherwise, and kept at a substantially constant-temperature, sothat the compression chamber arranged therein wouldbe pro tected fromfreezing, and, if extending below, would-be remote from frost.

Having described my ,inyen'tion, I claim,

In a pump having a reciprocating iston,

a well pipe, a piston rod operating t erein, operating means for thepiston rod, and a cushioning means adapted to cushion the return strokeof the parts comprising a cylin- .drioal fluid checlga casing supportedwithin the well pipe, a buffer piston afiixed to the piston rod andoperating within the cylindrical casing, a yielding valve coacting withi the bufler plston 'and adapted to permit compartively free passage ofthe fluid on the lift stroke of the piston rod and to restrict thepassage of the fluid on the return stroke, said buffer piston beingarranged to operate below the outlet passage of the well pipe andopenings from the well pipe into the casing substantially as described.

' In testimony whereof I have signed my name to this specification. p

FRANK A. FAY.

